Function loadRipgrepIgnorePatterns

src/hooks/fileSuggestions.ts:202–238

* Load ripgrep-specific ignore patterns from .ignore or .rgignore files * Returns an ignore instance if patterns were found, null otherwise * Results are cached per repoRoot:cwd combination

(
  repoRoot: string,
  cwd: string,
)

 * Results are cached per repoRoot:cwd combination
 */
async function loadRipgrepIgnorePatterns(
  repoRoot: string,
  cwd: string,
): Promise<ReturnType<typeof ignore> | null> {
  const cacheKey = `${repoRoot}:${cwd}`

  // Return cached result if available
  if (ignorePatternsCacheKey === cacheKey) {
    return ignorePatternsCache
  }

  const fs = getFsImplementation()
  const ignoreFiles = ['.ignore', '.rgignore']
  const directories = [...new Set([repoRoot, cwd])]

  const ig = ignore()
  let hasPatterns = false

  const paths = directories.flatMap(dir =>
    ignoreFiles.map(f => path.join(dir, f)),
  )
  const contents = await Promise.all(
    paths.map(p => fs.readFile(p, { encoding: 'utf8' }).catch(() => null)),
  )
  for (const [i, content] of contents.entries()) {
    if (content === null) continue
    ig.add(content)
    hasPatterns = true
    logForDebugging(`[FileIndex] loaded ignore patterns from ${paths[i]}`)
  }

  const result = hasPatterns ? ig : null
  ignorePatternsCache = result
  ignorePatternsCacheKey = cacheKey

  return result
}

/**
 * Get files using git ls-files (much faster than ripgrep for git repos)